From dc1dabe6b3eb7b90fa03877d068509f63031f2a2 Mon Sep 17 00:00:00 2001
From: Michael Schurter <schmichael@hashicorp.com>
Date: Mon, 24 Oct 2016 16:00:19 -0700
Subject: [PATCH] Fingerprint rkt volume support and make periodic

Fix rkt docs and custom volume mounting
---
 client/driver/docker.go                 |  2 +-
 client/driver/rkt.go                    | 15 +++++++++++----
 website/source/docs/drivers/rkt.html.md | 12 ++----------
 3 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/client/driver/docker.go b/client/driver/docker.go
index d99e6e08c425..c1b33d843313 100644
--- a/client/driver/docker.go
+++ b/client/driver/docker.go
@@ -369,7 +369,7 @@ func (d *DockerDriver) Fingerprint(cfg *config.Config, node *structs.Node) (bool
 	node.Attributes[dockerDriverAttr] = "1"
 	node.Attributes["driver.docker.version"] = env.Get("Version")
 
-	// Advertise if this node supports Docker volumes (by default we do not)
+	// Advertise if this node supports Docker volumes
 	if d.config.ReadBoolDefault(dockerVolumesConfigOption, dockerVolumesConfigDefault) {
 		node.Attributes["driver."+dockerVolumesConfigOption] = "1"
 	}
diff --git a/client/driver/rkt.go b/client/driver/rkt.go
index 333d1efb70f9..14f3b6087b1c 100644
--- a/client/driver/rkt.go
+++ b/client/driver/rkt.go
@@ -20,7 +20,6 @@ import (
 	"github.com/hashicorp/nomad/client/config"
 	"github.com/hashicorp/nomad/client/driver/executor"
 	dstructs "github.com/hashicorp/nomad/client/driver/structs"
-	"github.com/hashicorp/nomad/client/fingerprint"
 	cstructs "github.com/hashicorp/nomad/client/structs"
 	"github.com/hashicorp/nomad/helper/discover"
 	"github.com/hashicorp/nomad/helper/fields"
@@ -57,7 +56,6 @@ const (
 // planned in the future
 type RktDriver struct {
 	DriverContext
-	fingerprint.StaticFingerprinter
 }
 
 type RktDriverConfig struct {
@@ -175,9 +173,18 @@ func (d *RktDriver) Fingerprint(cfg *config.Config, node *structs.Node) (bool, e
 		d.logger.Printf("[WARN] driver.rkt: please upgrade rkt to a version >= %s", minVersion)
 		node.Attributes[rktDriverAttr] = "0"
 	}
+
+	// Advertise if this node supports rkt volumes
+	if d.config.ReadBoolDefault(rktVolumesConfigOption, rktVolumesConfigDefault) {
+		node.Attributes["driver."+rktVolumesConfigOption] = "1"
+	}
 	return true, nil
 }
 
+func (d *RktDriver) Periodic() (bool, time.Duration) {
+	return true, 15 * time.Second
+}
+
 // Run an existing Rkt image.
 func (d *RktDriver) Start(ctx *ExecContext, task *structs.Task) (DriverHandle, error) {
 	var driverConfig RktDriverConfig
@@ -247,8 +254,8 @@ func (d *RktDriver) Start(ctx *ExecContext, task *structs.Task) (DriverHandle, e
 				return nil, fmt.Errorf("invalid rkt volume: %q", rawvol)
 			}
 			volName := fmt.Sprintf("%s-%s-%d", ctx.AllocID, task.Name, i)
-			cmdArgs = append(cmdArgs, fmt.Sprintf("--volume=%s,kind=host,source=%s", volName, i, parts[0]))
-			cmdArgs = append(cmdArgs, fmt.Sprintf("--mount=volume=%s,target=%s", volName, i, parts[1]))
+			cmdArgs = append(cmdArgs, fmt.Sprintf("--volume=%s,kind=host,source=%s", volName, parts[0]))
+			cmdArgs = append(cmdArgs, fmt.Sprintf("--mount=volume=%s,target=%s", volName, parts[1]))
 		}
 	}
 
diff --git a/website/source/docs/drivers/rkt.html.md b/website/source/docs/drivers/rkt.html.md
index c82094baf7da..2056c76bcfa2 100644
--- a/website/source/docs/drivers/rkt.html.md
+++ b/website/source/docs/drivers/rkt.html.md
@@ -76,19 +76,11 @@ The `rkt` driver supports the following configuration in the job spec:
 * `debug` - (Optional) Enable rkt command debug option.
 
 * `volumes` - (Optional) A list of `host_path:container_path` strings to bind
-  host paths to container paths. Mounting host paths outside of the alloc
-  directory tasks normally have access to can be disabled on clients by setting
-  the `rkt.volumes.enabled` option set to false.
+  host paths to container paths.
 
     ```hcl
     config {
-      volumes = [
-        # Use absolute paths to mount arbitrary paths on the host
-        "/path/on/host:/path/in/container",
-
-        # Use relative paths to rebind paths already in the allocation dir
-        "relative/to/alloc:/also/in/container"
-      ]
+      volumes = ["/path/on/host:/path/in/container"]
     }
     ```